Sculptris is free to use, and supports the Zbrush team. You can also try Blender if you want a full-featured 3D program. And there are plenty of free image editors. If you want better software, try looking for academic discounts if you're a student, or maybe ask your relatives for a nice present.

Being poor is no excuse for theft. Pirated software is meant to help hackers gain control over computers and data by preying on desperate users. They don't put out software for free because they feel sorry for you.

These are actually seriously the best-looking 3d ponies I have ever seen. You've somehow managed to keep them looking like they belong in the show, whereas most 3d models completely lose the hand-drawn-looking style.